Ignore OldAndroidZipStreamTest#testZipStream failures with CC.

This test sometimes fails with a
java.util.concurrent.TimeoutException on ART Builbot's
x86 concurrent collector configuration:
* libcore.java.util.zip.OldAndroidZipStreamTest#testZipStream

Disable it while we investigate.

Bug: 26507762
Change-Id: I3c0860a1573b2f221634b5d28d82c01c35628867
diff --git a/tools/libcore_failures_concurrent_collector.txt b/tools/libcore_failures_concurrent_collector.txt
index e55c000..6ea83d2 100644
--- a/tools/libcore_failures_concurrent_collector.txt
+++ b/tools/libcore_failures_concurrent_collector.txt
@@ -30,6 +30,7 @@
   names: ["libcore.java.util.zip.DeflaterOutputStreamTest#testSyncFlushDisabled",
           "libcore.java.util.zip.GZIPOutputStreamTest#testSyncFlushEnabled",
           "libcore.java.util.zip.OldAndroidGZIPStreamTest#testGZIPStream",
+          "libcore.java.util.zip.OldAndroidZipStreamTest#testZipStream",
           "libcore.java.util.zip.ZipFileTest#testZipFileWithLotsOfEntries",
           "libcore.java.util.zip.ZipInputStreamTest#testLongMessage"],
   bug: 26507762